7^475-1

Open composite · C250

NFS Planning

GNFS Murphy estimate: 7.06e-18
SNFS Murphy raw: 8.38e-17
SNFS Murphy normalized (deg 6): 3.27e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.38905

Identifiers

Target expression: 7^475-1
Target link: FactorDB page
Target ID: 1000000000018628863
Target changed: Before 6/8/2026
Parent query: Same as target
Parent ID: -
Cofactor token: C250
Imported: Jun 07, 2026, 01:42 AM UTC

Raw pmain126 Factorization

(1,5,19,25,95) 11317814613933992051.1144066265767763993990721726534802301.C250

SNFS Polynomial

Polynomial

Degree: 8
Raw Murphy: 8.38e-17
Normalized (deg 6): 3.27e-17
Skew: 0.38905
Selected: Best

n: 1327561986485766187593613402928432652174835219422443923831041237724179642304997855389664168511253598087891740335002426013708310588588887994848408452213210999788338694789834655092779366115938671682730696417727883289283096340874154074988095996102836151
# 7^475-1, difficulty: 321.14, skewness: 0.38
# cost: 1.26757e+21, est. time: 603605.83 GHz days (not accurate yet!)
# Optimized skew: 0.38905 Murphy: 8.38e-17
skew: 0.38905
c8: 2401
c6: 343
c4: 49
c2: 7
c0: 1
Y1: -1
Y0: 5243338316756303634461458718861951455543
type: snfs